Punch



H. ROSENBERG. PUNCH.

APPLICATION FILED-NOV. 17. 1919.

1,41 1,809. Patented Apr. 4, 1922.

3 SHEETS-SHEET I.

Patented Apr. 4, 1922.

3 SHEETS-$HEET 2.

H. ROSENBERG.

PUNCH.

APPLICATION man NOV. 17. 1919.

H. ROSENBERG.

PUNCH.

APPLICATION FILED NOV. 1?, 19'9- 1,411,809. Patented Apr- 4, 1922.

3 SHEETS-SHEET a. I

a f. i

yea 771a Rosenberg.

UNITED STATES HEYMAN ROSENBERG, OF N EW Y ORK, N. Y.

PUNCH,

Specification of Letters Patent.

Patented Apr. 4, 1922.

Application filed November 17, 1919. Serial No. 338,548.

10 all whom it may concern:

Be it known that I, l lnrnxx ltosnlvnnne, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Punches, and I do hereby declare the following to be a tall, clear, and exact description ofthe invention, such as will enable others skilled in the art to which it appertainsto make and use the same.

This invention relates to improvements in punches, and has-as its primary object the provision of means enabling the-punch to be used interchangeably as a hand punch or a bench punch.

it; further object in view is the adaptation of such a structure for quicknessand ease of application to and removal from its bench support.

WVith these and further, objects in View as will in part hereinafter become apparent and in part be stated, the invention comprises certain novel constructions, combinations and arrangements of parts as subse quently specified and claimed.

In the accompanying drawings,

Figure 1 is a view in side elevation oi a punch structure embodying the features of the present invention with the punch attached to its bench support.

Figure 2 is a similar view of the same detached from such support.

Figure 8 is a front view thereof.

ldigure 4 is a fragmentary section taken on the plane indicated by line a '-'l of Figure 3, parts being seen in elevation.

Figure 5 is a top plan view thereot.

Figures 6, 7, and 7 are sections taken re spectively on the planes indicated by lines 66, 77 and 7 -7 of Figure 1.

Figure 8 is a perspective view of the gauge clip detached. s

Figure 9 is a detail sectional elevation of the punch and punch holder.

Referring to the drawings by numerals, 1 indicates a supporting bed bolted at 2. E2, or otherwise appropriately fixed to a table or bench. The bed is preferably oi: cast iron, or other appropriate material, and formed hollow and having an upstanding pair of ears 3 at its rear end. The ears 3 are spaced apart a distance sufficient to accommodate therebetween a web 4 of the punch proper hereinafter described. A pin 5 slidingly extends through the ears 3 for detachably locking the web 4 in engagement therewith. The. pin- 5 is. formed with a longitudinal groove 6 into which extends the end of a detent screw 7 threaded through a portion oi one of the ears 3. The groove 6 is of a length and so located in the pin 5 as to allow the pin to be completely withdrawn laterally of web also as toleave the web free to be removed from between the ears-3 with out actually detachingthe pin 5 from engagementwith one of the cars so that said ine is not liable to become lost. 'Screw 7' must be backed offbetore the pin 5 can be completely withdrawn.' Atthe i'orward portion of the base or bed 1, the bed is slotted :t'or accommodating the web 8 ofthe punch proper hereinafter described, and; the side walls of the bed, at each side of the forward slot, are grooved out to form bayonet slots 9, 9, opening upward and-designed to receive lateral lugs 10, 10 extending from the respective sides oi the web 8' and preferably formed integral therewith. Each slot 9 extends from its upper open end downwardly and lower arms of said member. The web 8,

has its outer or free edge struck on thearc of a circle, and has its rear portion elongated and formed with a slot l2 to'produce an operating handle 13, from which. handle depends the web 4. The handle 18 is prob erably strengthened by lateral thickening of the rearwardly extended part of the web, as clearlyseen inEigure 6. y

The forward end oftheupper arm of the bony 11 terminates in a transversely arranged. vertically-clispos,ed sleeve lain which is slidably mountedthe punch holder 15, the upper end of whichis pivoted at 16 to the short end of an operating leverl'T. Lever 17 is pivotedat 18 betweenthe upper endportions of a pair of linlrs 1 9, thesaid links'extending respectively, on theopposite sides ofthesleeve. 14- and beingpivoted at their lower end portions, as at 20,.so that as the lever 17 is manipulated its pivot 18 is free to .m ove through an arc described about the pivot 20 and thus permits the punch holder 15 to reciprocate in a rectilinear path. The lower end portion of the holder 15 is longitudinally bored to form a socket 21 for receiving the reduced up r end portion 22 of the punch 23. The said reduced portion 22 is recessed laterally, as at 24, and a set screw 25 is threaded through the side wall of the socket 21 so that its inner end extends into therecess 24 and rigidly secures the punch 23 in detachable engagement with the holder 15. The front face of the sleeve 14 is preferablyflattened and serrated, as indicated at 26, the form of the serrations being preferably such as to present abrupt or horizontal faces downward and slanting faces upward and outward. A plate 27 is formed wlthopposing serrations designed to fit in the serrations 26 so that the plate 27 may not be forced upward while the teeth of the serrations are thus in mesh. 7 A longitudinal slot 28 is formed in the plate 27 and an integral, referably rectangular boss 29 outstands ii'om the front face of the sleeve 14 into the slot 28 so as to serve as a guide for the plate 27 when the plate is being adjusted longitudinally. A thumb screw'30 is threaded into the boss 29 and has its head of a size suflicient to overlie portions of the front face of plate 27, at the sides ofthe slot 28, so that when "the thumb screw 30 is screwed down tight it will firmly clamp the plate 27 as to form stripping arms 31 extending on opposite sides of the punch 23. The head of the screw 25 is proportioned to pass through the slot 28 so as to be accessible and susceptible of application and removal while the plate 27 is 1n place. The head of the screw 2:) extends within the slot and moves therein during operation, and the front portion of sleeve 14 is slotted vertieally,as at 32, for a distance slightly greater than the travel of the screw 25, so as to permitfree movement thereof. p

. The forward end ortion of the lower arm of the body 11 is orrned with a threaded sleeve 33 into which is threaded the tubular die 34. The die 34 is preferably formed'with clefts 35 to receive a screw driver or like instrument for adjustment and for removal and application from and to the sleeve 33. The die 34 is, of course, located in axial alinement with the punch 23.

The die 34 has its upper end portion formed with a smooth section 36 which extends above the sleeve 33 and is adapted to be surrounded by the eye 37 of a gauge consisting of a plate 38 which extends rearwardly along the upper edge of the lower arm of body 11, and at its rear portion is formed with a clip consisting of clamping prongs or b y 11.. The clips 39 are preferably spring material so as to be easil and quickly cli arms 39 shaped to snugly fit about til;

applied and removed, and at t e same time .firmly grip the body 11 when applied, so

that between the engagement of the eye 37 and the clips, 39 the plate 38 is firmly held in position while in use. The plate 38 is preferably graduated and is engaged by a sliding sleeve 40 having a set screw 41 adapted to clamp the sleeve to the plate 38 at any desired point of adjustment. Fixed to the sleeve 40 and extending transversely of and above plate 38 is the gauge plate 42 against which the article to be punched is positioned just before the punching operation.

. In operation, the punch structure proper is applied to thebench support or bed 1 by first inserting the lugs 10 into the upper ends of bayonet slots 9 and passing them down and along the slots to the terminals thereof, whereupon the parts are in position for the rear or handle portion of the punch to be swung down until the web 4 passes between the ears 3 and the aperture in the web comes into alinement with the pin 5, the pin having been previously moved to its withdrawn position. The parts .being in this position, the pin 5 is shifted axially to the position indicated in Figure 6, and the punch structure is then ready for operation as a bench instrument, being firmly and effectively anchored to the table or bench to which the bed 1 is connected. When the punch structure is to be used by hand away from the bench, the pin 5 is withdrawn axially and the rear portion of the punch structure swung upward on the lugs 10 as pivots and the lugs are withdrawn from the slots 9. The operation of attachment and detachment therefore is very simple, easy and quick of accomplishment. When attached to bed 1, the operation of the punch is the same as when detached exceptthat when attached it is optional with the operator whether or not anything more than the lever 17 is grasped during the operation. It is, however, customary to grip the end portion of lever 17 and the laterally thickened portion of handle 13 for any operation. p

The operation of the punchf ro er is thought to be obvious and may e riefiy stated as follows The gauge plate 42 is set according to the distance the punched hole is to be made from the edge of the material to be punched. The material is then inserted beneath the punch, the punch having been raised to its some times the punched sheet clings to punch 23, but in that event it strikes the stripper 31 during the ascent of the punch and the punched sheet is thus stripped from the punch. The location of the stripper arms 31 may be varied as desired according to the thickness of material being operated upon.

I claim 1. In punching apparatus, the combination of a bed having a slot, a punching machine having a projection adapted to move into and out of the slot and to rest against the end of the slot, a pin slidingly carried by the bed, and an apertured portion on the punching machine positioned for being swung toward and away from the pin for bringing the aperture thereof into and out of alinement with the pin, the swinging movementbeing described on a circle about the projection as a pivot.

2. In punching apparatus, the combination of a bed, a punching machine having a body and a handle, a projection extending from the body, the bed having a slot adapted to receive said projection, and means of detachable connection for connecting the handle to the bed in position for preventing release of the projection from the slot.

3. In punching apparatus, the combination of a bed having an opening and lateral slots at the sides of the opening, a punching machine havingaportion adapted to extend through the opening of the bed and having lateral projections extending into the slots of the bed, and means for securing the machine to the bed in position to prevent release of the projections from engagement with the slots.

4. In punching apparatus, the combination of a substantially U-shaped body, the upper arm of the U terminating in a sleeve, a punch holder reciprocally mounted in the sleeve, a punch carried thereby, means for reciprocating the punch holder, a plate clamped to the front face of the sleeve and being formed with stripper arms extending past the punch,- and a die carried by the other arm of the body in alinement with the punch. v

5. In punching apparatus, the combination of a substantially -U-shaped body, the upper arm of the U terminating in a sleeve, a punch holder reciprocally mounted in the sleeve, a punch carried thereby, means for reciprocating the punch holder, a plate clamped to the front face of the sleeve and being formed with stripper arms extending past the punch, and a die carried by the other arm of the body in alinement with the punch, the front face of the sleeve and the inner face of said plate being formed with interlocking serrations for preventing upward shifting of the plate.

6. In punching apparatus, the combination with a body having a sleeve, of a punch holder reciprocally mounted therein, means for actuating the holder, the holder being formed with an axial socket at its lower end portion, a punch having a reduced shank extending into the socket and being formed with a lateral recess, and a set screw threaded through the wall of the punch holder into the recess of the shank of the punch, the sleeve being formed with a slot into which the set screw extends.

7. In punching apparatus, the combina: tion with a punch body and punch means carried thereby, of a plate having a clip adapted to clamp the punch body, a sleeve adjustably carried by said plate, and a gauge plate carried by said sleeve transversely of the'plate.

8. In punching apparatus, the combination with a punch body and a die outstanding therefrom, of a plate having an eye surrounding the outstanding portion of the die, said plate also having a clip engaging the punch body, and a gauge adjustably carried by said plate.

In testimony whereof I aflix my signature in presence of two witnesses.

HEYMAN ROSENBERG. /Vitnesses:

CHARLES KRUPITZKY,

RICHARD R. KRUPITZKY. 

